Similar to a laptop conga. LP makes them and a guy in Argentina makes his own version.
http://pepemensi.blogspot.ca/search?upd ... results=10
I made one too.
viewtopic.php?f=4&t=5288&p=83773&hilit=laptop#p83773Difference being the open body, size and quality of materials.
I kind of tried something like yours but worked with a shape sort of like rectangular doumbek ... wondered what effect the shape would have.
None
... ended up as fire wood. But I'm a hacker not a craftsmen like you so likely it may work in the hands of someone with skills.